diff --git a/editions/tw5.com/tiddlers/mechanisms/ParsingMechanism.tid b/editions/tw5.com/tiddlers/mechanisms/ParsingMechanism.tid
index 0708fda6b..a64ac5faf 100644
--- a/editions/tw5.com/tiddlers/mechanisms/ParsingMechanism.tid
+++ b/editions/tw5.com/tiddlers/mechanisms/ParsingMechanism.tid
@@ -1,5 +1,5 @@
 title: ParsingMechanism
-tags: mechanism
+tags: mechanism dev
 created: 201311011307
 modified: 201311011307
 
diff --git a/editions/tw5.com/tiddlers/mechanisms/TestingMechanism.tid b/editions/tw5.com/tiddlers/mechanisms/TestingMechanism.tid
index 6c6933d52..8c69e2dfb 100644
--- a/editions/tw5.com/tiddlers/mechanisms/TestingMechanism.tid
+++ b/editions/tw5.com/tiddlers/mechanisms/TestingMechanism.tid
@@ -1,5 +1,5 @@
 modified: 201311222159
-tags: dev
+tags: dev mechanism
 title: TestingMechanism
 
 TiddlyWiki5 incorporates the Jasmine JavaScript testing framework (see http://pivotal.github.io/jasmine/). It allows the same tests to be run both in the browser and under Node.js.